Here are my results. I ran consistantly 13.60 ET 100 mph with 1.9 60'. Tranny is sluggish or hesitates on 1-2 shift and top end pull. Dealer will either fix or replace with a new tranny! I pulled a 06 GTO by 3 car lengths out of the hole but red lighted by .030 and he passed me at the 660' mark. (a modded GTO, 6 speed) After I added 5 gals of 100 unleaded, big improvement! It works on my Jeep, instant results! I was afraid to add it before my last run at the track. Mostly stock Jeep, with just a couple of simple mods. Ran just as fast as another with exhaust and CAI. All the hype of big gains from these mods aren't true. Engs. did their homework designing thes SRT Vehicles. The PCM hold the most in Performance Gains is my opinion so far. I won't post any vendor's products on the other JGC SRT8 but saw the results in person. The drag strip is just like street driving where the dyno is just WOT pulls. I'll be running again before the Winter Soltice here in MN. Gene

I attest, for I was the guy with the mods:(

The only differences were I never opened my hood, iced the engine, or used race gas; I wanted to duplicate the street racing atmosphere.


We need a PCM mod to unlock the effects of aftermarket accessories, because without a calibrated PCM, aftermarket exhausts and intakes are placebic.

By the way, I had a great time, Gene! Thanks for the advice at the track. I hope to do it again!

Gene,
Thanks for the info.
let me say it this way: reference to the mods available in the market:

Option-1: GC with CAI & CAT-back
Option-2: pure Stock with Re-flash

My understanding from your thread is that when you added the 100 Fuel, your truck runs as fast as another one with CAI & Cat-Back.
That means if I do a re-flash for my stock car, will have the same result of another one with CAI & Cat-back, or maybe better

Which one you advise Opt.1 or Opt2?
I feel 2 will make it.. but you guys tell me
Thanks

SRTJeep What were your time when you ran 100 octane????

13.6 seems slow but i have no way of knowing unless you post the track conditions

black srt8 what were your mods and times? (plus track conditions from one of you please)

It was 65*, but humidity was between 70-80% all day.

I will scan my slips later.

I ran consistantly 13.60 ET 100 mph with 1.9 60'. Tranny is sluggish or hesitates on 1-2 shift and top end pull. Dealer will either fix or replace with a new tranny!


I ran high 13.6's thru 13.7's @ 99 to 100 pretty consistent a few weeks ago, here in the muggy south. I've got Mopar CAI and B&B Catback. Another JGC stock ran just slightly slower (can't remember but maybe .5 second at most) usually with a better 60' but lower traps (again, just slight). One thing that stuck out was how different tranny felt each run, but still same results. Let us know if dealer is ammicable to your issue, I'm guessing though you're not mentioning the issue occurs at the track:)

SRTjeep you are dead on.The SRT team did an awesome job with this jeep.We need a hand held PCM in a big way, and I am almost 100% sure we can shave at least 1/2 a second off the quarter mile.The bigiest problem is the trans,WHAT A MESS!! The shift from 3rd to 4th is the worst.I have such lag and 2nd to 3rd could use some help as well.As far as mods go there is lots of hype and there are also good mods.I would suggest to anyone looking to do mods the best bang for your buck(besides the Supercharger) would be the KOOk's headers and the GSM CAI.I was with a guy 3 weeks ago that shaved 1/2 a second off his quarter mile time with a CAi and the KOOK's headers.I think he had the DUB CAI.1/2 a second with headers and CAi is a big deal! I was told that they are making 40HP with just the headers and I watched it.It WORKS!! hats off to Kooks.As soon as I saw that I called up GS Motorsports and got a set.be sure to order teh sim boxes http://www.gsmotorsports.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=CATSIMHMI
As the headers will throw on the check engine light.and from what I hear you can be loosing HP because of it

I didn't add the 100 oct at the track but on the way home at a friends house, raced with 92 oct. (drag racing burns a lot of gas like 9.8 mpg) Both of my two runs were done in 2006, April 08 and 9/24 at the same track but the temps were cooler (4/08) but the traction wasn't as good. Definitely my tranny problem hurts my MPH and ET. (I'll be contacting my Dealership tomorrow and scheduling a visit to repair or for the replacement of my tranny) It has been getting worse since new and more mileage on the vehicle, 4000 now. The PCM re-flash on a stock or slightly modified vehicle will add a lot of performance, even stock. Some LX Vehicles in TX have picked up .4 to .5 performance gains, (heard second hand), maybe more with mods? (guessing for now) The temp gage showed 47* on arriving at the track, temp was 09C, dew point was 08C, track altitude is 900' above SL. I didn't calculate the Density Altitude but can. My first run was at 8:30 am and my last was at 2:22 pm. I will run again before the Winter Soltice Happens. Hopefully better performance then? Good Racing. Gene

Icing the manifold with the stock thermostat doesn't work the same as running a colder one plus the manual fan switch. (I've been told the PCM pulls out as much as 4* of timing after the coolant temp reaches 200*) This helps a lot and adding the 100 oct unleaded proves this. (no detonation) I do think a good CAI plus a nice Cat Back Exhaust are a good investment! Your Choice there. I think after doing this; a PCM Re-flash is the ticket and would really wake up this vehicle. MHO Gene

I have contacted Power ported performance, and they told me that PCM re-flash 25-30HP gain. I will dyno my car next week as a stock basis, and then will order the re fash thing. I will keep you posted.:)

Please do!! We need the flash!!

lol...stock Trailblazer ss's have ran faster then that...

I don't care what the SS is running,as long as I can get ths trani fixed,and add 25 to 30 HP I will be stoked!

lol...stock Trailblazer ss's have ran faster then that...


really...educate me (I mean that sincerely, not smart ass). I was thinking of switching my 300C srt8 for a GC srt8 or TB ss (I also have an sts v- -and have had the 300 for a year and a half- so I am thinking i car and one suv).

I have been turned off to the TB because all the research I do (every mag and all the forum posts) indicate the GC is way faster. It even seems faster stock than TB SS with exhaust and tune (some of these tests, like car and driver, have the GC a full one seconf faster in 0-60).


If thats all wrong I will reconsider the TB...

Just returned from the Viper Owner Invitational in Las Vegas. Had the opportunity to talk to Herb Helbig (really is a "car guy"). I asked him why my GC was rated at 420 and my 300 rated at 425. He said the exhaust manifolds had to be changed in order to get the engine in the frame. Also said a CAI should easily get the 5 hp back.

Of more significance is that Dan Cragin of DC Performance in Los Angeles told me his company has developed a computer reprogram that will change the limiting factory torque management program! Should also be able to turn the fan on sooner thus taking advantage of a lower temp thermostat.

As soon as I get the BB exhaust installed I will take the GC to Dan for the dyno tuning/computer work.

really...educate me (I mean that sincerely, not smart ass). I was thinking of switching my 300C srt8 for a GC srt8 or TB ss (I also have an sts v- -and have had the 300 for a year and a half- so I am thinking i car and one suv).

I have been turned off to the TB because all the research I do (every mag and all the forum posts) indicate the GC is way faster. It even seems faster stock than TB SS with exhaust and tune (some of these tests, like car and driver, have the GC a full one seconf faster in 0-60).


If thats all wrong I will reconsider the TB...


Think about it...The Trailblazer SS has a LS2,the aftermarket is crazy for them,and not limited in any single way(like the GCSRT8).No doubt the SRT is faster stock,but they can barley mod them(thats why i saved 10k on my purchase,and went with the TBSS).Right now as the truck sits i have a Yank SS3600 converter,ud pulleys,cai,ls1 fans,iat mod,and dyno tuned with HP Tuners.Im think about going with either Heads and cam with spray,a blower or a turbo with some serious boost,the possibilities are endless.Good luck with your decision and i hope you make the right choice

Think about it...The Trailblazer SS has a LS2,the aftermarket is crazy for them,and not limited in any single way(like the GCSRT8).No doubt the SRT is faster stock,but they can barley mod them(thats why i saved 10k on my purchase,and went with the TBSS).Right now as the truck sits i have a Yank SS3600 converter,ud pulleys,cai,ls1 fans,iat mod,and dyno tuned with HP Tuners.Im think about going with either Heads and cam with spray,a blower or a turbo with some serious boost,the possibilities are endless.Good luck with your decision and i hope you make the right choice

thanks..I totally agree about "modability".....

I don't even have to be the fastest..I would just like to be able to run a sub 5 second 0-60, and a 1/4 around 13.5 to feel good about the vehicle..what mods would I need (cause I also agree with you on the vehicle price).

thanks..I totally agree about "modability".....

I don't even have to be the fastest..I would just like to be able to run a sub 5 second 0-60, and a 1/4 around 13.5 to feel good about the vehicle..what mods would I need (cause I also agree with you on the vehicle price).

Honestly,some have reported 13.5 with just a drop in filter.Basicly what you want is just getting it tuned with a cai,and youll put down around 355whp and get what you are descibing that you want out of the vehicle.when i got it tuned with the cai its was a totally different beast.GM detuned it from the factory pretty hardcore,but thats where the ability of hp tuners comes in and fixes everything.The price gap is just to much to look away from,i priced a GCSRT8 at 47k,drove it and tought it was quick but come on 10k more then the TBSS.I also owned regular GC before the TBSS,and the tranny had all kinds of problems.I took it in about 4 times before i finnaly said screw it,im sick of all the problems,and poor poor service.

Honestly,some have reported 13.5 with just a drop in filter.Basicly what you want is just getting it tuned with a cai,and youll put down around 355whp and get what you are descibing that you want out of the vehicle.when i got it tuned with the cai its was a totally different beast.GM detuned it from the factory pretty hardcore,but thats where the ability of hp tuners comes in and fixes everything.The price gap is just to much to look away from,i priced a GCSRT8 at 47k,drove it and tought it was quick but come on 10k more then the TBSS.I also owned regular GC before the TBSS,and the tranny had all kinds of problems.I took it in about 4 times before i finnaly said screw it,im sick of all the problems,and poor poor service.


thanks..I am reconsidering.....

I just can't stand the look of the TBSS. And the thought that it is a GM vehicle... Ugghh... My CTS-V is in the shop at least once a month. I am 23 years old and have many, many vehicles left to buy. I can honestly say I will never buy another GM vehicle because of this experience. GM reliability is the worst. Good luck with yours.

I am hoping the GC SRT8 will be different. But who knows; you take a chance with any performance vehicle it seems.

Ive had one issue (and the previous owner had zero, had it checked) with the ESM that nearly got me into about 6 accidents and certainly made me look like a ****.

It took two stops to have it tracked down and then 4 hours to have the entire assembly replaced but now its absolutely problem free. 5300 miles.

Think about it...The Trailblazer SS has a LS2,the aftermarket is crazy for them,and not limited in any single way(like the GCSRT8).No doubt the SRT is faster stock,but they can barley mod them(thats why i saved 10k on my purchase,and went with the TBSS).Right now as the truck sits i have a Yank SS3600 converter,ud pulleys,cai,ls1 fans,iat mod,and dyno tuned with HP Tuners.Im think about going with either Heads and cam with spray,a blower or a turbo with some serious boost,the possibilities are endless.Good luck with your decision and i hope you make the right choice

I had the TBSS and traded it on on a Jeep. The TBSS is a piece of **** compared to the Jeep or any other DXC product. It has absolutely no torque.....the tranny shifter is impossible to shift...the front seats are flat and uncomfortable...the seat belt cuts into your neck...the handling is like a Ford......the dash and the materials used are from the 80's Blazer....and for an Ls2 motor it is very very disappointingly SLOW......period. Your on crack if you think the TBSS is anything close to the Jeep in design......quality and ESPECIALLY performance!!!

You need one of those new billet Turbonators..........

Here are my results. I ran consistantly 13.60 ET 100 mph with 1.9 60'. Tranny is sluggish or hesitates on 1-2 shift and top end pull. Dealer will either fix or replace with a new tranny! I pulled a 06 GTO by 3 car lengths out of the hole but red lighted by .030 and he passed me at the 660' mark. (a modded GTO, 6 speed) After I added 5 gals of 100 unleaded, big improvement! It works on my Jeep, instant results! I was afraid to add it before my last run at the track. Mostly stock Jeep, with just a couple of simple mods. Ran just as fast as another with exhaust and CAI. All the hype of big gains from these mods aren't true. Engs. did their homework designing thes SRT Vehicles. The PCM hold the most in Performance Gains is my opinion so far. I won't post any vendor's products on the other JGC SRT8 but saw the results in person. The drag strip is just like street driving where the dyno is just WOT pulls. I'll be running again before the Winter Soltice here in MN. Gene

Putting 100 octane in a motor designed for 92 is like putting 92 in a motor designed for 87.......your pissin away your money!!! There is NO WAY the ecu is going to adjust itself and provide more timing simply because you put 100 octane in the tank. That is the biggest bunch of disinformation yet I have read on this thread. If anything the slower burn rate may actually hinder the performance......SOTP dont count....remember!

i just dont understand why this TBSS guy keeps posting threads on this danm site when most people considers him unwelcomed and likes throwing a bunch of bull at people trying to trick them in thinking its faster than the GCSRT8. its not even close, if you think its faster then lets see some real numbers up on this here thread instead of talking smack. if it is faster then prove it but if its not then just cancel your danm membership off this site and go put a sh*t load of mods on your GM matchbox car trying to make it faster then our jeeps because honestly by the time you get it faster than the stock srt8 we'll all have s-chargers and ported heads and we'll run your bhcti ass off the drag strip so quit trying to make arguements with us and show us something rather than running your mouth....oo but wait internet tough guy doesnt like giving proof

Honestly,some have reported 13.5 with just a drop in filter.Basicly what you want is just getting it tuned with a cai,and youll put down around 355whp and get what you are descibing that you want out of the vehicle.when i got it tuned with the cai its was a totally different beast.GM detuned it from the factory pretty hardcore,but thats where the ability of hp tuners comes in and fixes everything.The price gap is just to much to look away from,i priced a GCSRT8 at 47k,drove it and tought it was quick but come on 10k more then the TBSS.I also owned regular GC before the TBSS,and the tranny had all kinds of problems.I took it in about 4 times before i finnaly said screw it,im sick of all the problems,and poor poor service.
BS. Show me proof of a TBSS running a 13.5 with a drop in filter. Anyways the majority of you SS guys arent running the times a few are after tune, converter, catback, and cai. Ive seen plenty of times in the 13.9s and low 14s modded like that and a very small handful, maybe 30% that make into the mid and low 13s. The TBSS is really hit and miss with how they will run stock and modded and the heatsoak is absolutely terrible. The 4 speed auto alone is reason to spend the extra money and avoid the trailblazer.